The vCenter STS service must enable "ENFORCE_ENCODING_IN_GET_WRITER".

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259000	VCST-80-000152	SV-259000r934658_rule		Medium

Description
Some clients try to guess the character encoding of text media when the mandated default of ISO-8859-1 should be used. Some browsers will interpret as UTF-7 when the characters are safe for ISO-8859-1. This can create the potential for a XSS attack. To defend against this, enforce_encoding_in_get_writer must be set to true.

STIG	Date
VMware vSphere 8.0 vCenter Appliance Secure Token Service (STS) Security Technical Implementation Guide	2023-10-29

Details

Check Text ( C-62740r934656_chk )

At the command line, run the following command: # grep ENFORCE_ENCODING_IN_GET_WRITER /usr/lib/vmware-sso/vmware-sts/conf/catalina.properties Example result: org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER=true If "org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER" is not set to "true", this is a finding. If the "org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER" setting does not exist, this is not a finding.

Fix Text (F-62649r934657_fix)
Navigate to and open: /usr/lib/vmware-sso/vmware-sts/conf/catalina.properties Update or remove the following line: org.apache.catalina.connector.response.ENFORCE_ENCODING_IN_GET_WRITER=true Restart the service with the following command: # vmon-cli --restart sts